/*
 * Copyright (c) 2012 Robert Burrell Donkin robertburrelldonkin.name
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
 * and associated documentation files (the "Software"), to deal in the Software without restriction, 
 * including without limitation the rights to use, copy, modify, merge, publish, distribute, 
 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software 
 * is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all copies or 
 * substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 */
package walrus.text.wiki.micro;

public class BracketFilter extends AbstractFilter {

	public static BracketFilter filterCurly(WikiPullParser parser) {
		return new BracketFilter(parser, true);
	}

	public static BracketFilter filterOnSquare(WikiPullParser parser) {
		return new BracketFilter(parser, false);
	}
	
	
	private final boolean curly;
	
	private BracketFilter(WikiPullParser parser, final boolean curly) {
		super(parser);
		this.curly = curly;
	}

	@Override
	protected void doClear() {}

	@Override
	protected WikiState processNext(WikiTracker tracker, WikiState next) {
		if (curly && (tracker.isInCurly() || next == WikiState.CLOSE_CURLY)
				|| !curly && (tracker.isInSquare()|| next == WikiState.CLOSE_SQUARE)) {
			return next;
		} else {
			return next();
		}
	}

	
}
